The Front Hub and Wheel Bearing isn't something most people think about until it's time to replace them. They generally work seamlessly... Until they don't. If you've noticed a groaning from one or both of the front wheels on your E60 525i/528i/535i/545i/550i and E63 645ci/650i, especially when turning, it's likely the bearings.
The easiest way to verify if it's your wheel bearings is to jack the front of the car, put a hand on top and on the bottom of the wheel in question, and try to see if the wheel has any play. If it does, it's best to change the wheel bearings before they become more than just an annoying sound and leave you stranded on the road.
BMW calls for new mounting bolts at the same time as the new hub. These are part #31206779384 and are a M12x1.5 55mm bolt. Four bolts are required per hub. See Related Items below.
This is an OEM wheel bearing manufactured by F.A.G. - the original supplier to BMW for this part, as well as many other wheel bearings. This part may be packaged as a LuK brand, a sister company of FAG. As the OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.
BMW Fitments:
5 Series
E60 / E61 (04-10) > 525i M54 (2004-2005)
E60 / E61 (04-10) > 525i N52 (2006-2007)
E60 / E61 (04-10) > 528i
E60 / E61 (04-10) > 530i M54 (2004-2005)
E60 / E61 (04-10) > 530i N52 (2006-2007)
E60 / E61 (04-10) > 535i
E60 / E61 (04-10) > 545i
E60 / E61 (04-10) > 550i
6 Series
E63 / E64 (04-10) > 645Ci
E63 / E64 (04-10) > 650i